Use Core::Id in project-related objects

Use Core::Id for all the project related objects in favor of plain
QStrings.

Change-Id: I790ab40cb29899efdb49c413a77609486f52e683
Reviewed-by: Daniel Teske <daniel.teske@nokia.com>

src/plugins/android/androidrunconfiguration.cpp

@@ -52,7 +52,7 @@ using namespace ProjectExplorer;
 
 AndroidRunConfiguration::AndroidRunConfiguration(AndroidTarget *parent,
                                                  const QString &proFilePath)
-    : RunConfiguration(parent, QLatin1String(ANDROID_RC_ID))
+    : RunConfiguration(parent, Core::Id(ANDROID_RC_ID))
     , m_proFilePath(proFilePath)
 {
     init();